1) Install an issued SSL, or I can also help with the issuing/reissuing process.
Why you need an SSL:
1)An SSL encrypts the info that users submit on a site to protect it from being read by unauthorized parties. HTTPS:// and a padlock in the web address indicate that the site has an SSL.
2) An SSL will make your website more trustworthy to customers as they will be sure that the info they submit will be secure (card numbers, login details)
3) Google officially ranks SSL-secured sites higher